Sheet applying device



Dec. 17, 1940. E. HOPE SHEET APPLYING DEVICE Filed May 6, 1939 Patented Dec. 17, 1940 UNITED STATES PATENT OFFICE SHEET APPLYING DEVICE Ernest Hope, Leicester, England, assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J., a corporation of New Jersey Application May 6, 1939, Serial No. 272,171 In Great Britain June '7, 1938 8 Claims.

the illustrated device comprises an annular'tool supporting member, a pressing plate, a lever arranged to force the plate against the abrasive carrying surface of the tool and means for centering the tool with relation to the pressing plate. The invention will be better understood when considered with relation tothe accompanying drawing, in which the figure is an elevation, partly in section, of the disk applying device with a tool inserted therein.

. The invention is illustrated as employed in applying an abrasive sheet to a rotary abrading tool :having ahollow stem 10 whichis internally tapered and is adapted to be fittedupon and rotated. by'a downwardly projecting tapered spindlethatcommonly forms a part of a well-known type of shoe bottom finishing machine. One end ofthe'stem carries a flange I2 against which a rubber backing disk I4 is held by a screw I6. An abrasive sheet I8, which may conveniently be formed in the shape of an annular disk, is cemented, preferably by means of a permanently tacky adhesive, to the lower or abrasive carrying surface of the rubber disk H.

The abrasive sheet I8 is slightly larger in diameter than the disk I4 so that in use it tends to roll over the edge of thedisk, thus insuring I the disk will not come in contact with the work.

Tools of this type are frequently used to scour those portions of the soles of shoeswhich are adjacent to the heel breast, since the flexibility of the rubber backing disk l4 permits the tool to conform to the contours of the sole.

In order to provide for accurate positioning and firm attachment of the abrasive ring-shaped disk l8 to the tool, an applyingdevice is provided having a stem 20 which may be readily grasped by the operator and used as a handle. Projecting upwardly from the stem are two arms 22 spaced in the manner of a fork and carrying a c-shaped tool supporting member 24 pivoted on coaxial pins 26 extending inwardly from the arms 22. An opening 21 in one side'of the tool supporting member is large enough to enable the stem ll! of the tool to pass through it, thus perwith its adhesive side up.

mitting the sheet applying device to be used without removing the tool from the machine.

The stem 20 is drilled to receive a tube 28 which is slidable therein. The: end of the tube 28 adjacent to the arms 22 carries a circular pressing plate 30 from the center of which projects a pin 32. The plate 30, the tube 28 and the pin ,32' are fastened together by means of a pin 34.

A lever 36 is fulcrumed at 38 on the stem and has ashort arm which is arranged to extend through a slot 42 in the tube 28 and engage a crossv pin 44, fixed in the tube. A screw 46 engaging-the slot 42 prevents the tube from rotatmg. I I i To use the device to apply a disk to the tool the operator slips the device over the tool, passing the stem I0 through theopening 21 in the tool supporting member and seats the tool on the supporting member, with the upper surface of the rubber disk [4, i. e., the back of the tool resting against the lower surface of the supporting member 24. The operator then places an annular disk of abrasive material on the presser plate 30 He then raises the presser plate 30 with his thumb until the pin'32 enters an aperture 48; in the center of the screw 16, thus centering the tool with relation to the I presser plate and insuring that the overhang of the abrasive disk 18 will be equal at all points about the circumference of the rubber bearing disk 14.

During this operation the tube 28 slides upwardly in the stem 20 sufliciently to'permit the arm 40 to enter the slot 42 and engage the crosspin 44. The operator then applies pressure to the lever 36 to raise the'presser plate until the adhesive-coated abrasive ring is brought into engagement with the working face of the rubber disk [4, whereupon the abrasive ring and the rubber backing disk are clamped between the presser plate 30 and the tool supporting member 22, thus insuring a firm adhesion at all points between the abrasive disk and the rubber bearing disk [4; It is to be noted that the tool support is enabled, by reason of the pivotal mounting on the pins 25, to tilt to compensate for variations in the thickness of the abrasive disk or of the tool, and thus insures equal pressure at either side of the tool.

The extent of the pin 32 projecting above the presser plate 30 insures that the pin Will engage the tool and center it with relation to the presser plate before any contact can be made between the abrasive disk and the rubber bearing disk 14.

Having thus described the invention, what is frame, and means cooperating with said supporting member to press an abrasive disk against the working face of the tool to attach the abrasive disk adhesively to the tool.

2. A device for applying abrasive disks to rotary abrading tools comprising a frame, pivot members carried by said frame, an annular tool supporting member mounted for rocking movement on said pivot members and having an opening in its side, and means for pressing an adhesive-coated abrasive disk against the working face of the tool to attach the abrasive disk to the tool. v

3. A device for applying abrasive disks to rotary abrading tools comprising an annular support constructed and arranged for engagement with the back of a disk-shaped abrading tool, a frame on which said support is mounted, acircular plate mounted in said frame for movement toward the working face of a tool engaging said support, means for urging said plate toward the tool to cause an adhesive-coated abrasive disk carried by the plate to adhere to the working face of the tool, and a pivotal connection between said annular support and said frame to enable the support to tilt and thereby insure uniform pressure between the circular plate and the tool.

4. A device for applying abrasive disks to rotaryTabrading tools comprising a frame, a C- shaped tool supporting member tiltably mounted in said frame, a presser plate, and a lever for urging said plate toward the working face of a tool held by said support to apply by pressure to the working face of the tool an adhesive-coated disk.

5. A device for applying an abrasive disk to a rotary abrading tool on a shaft, said device comprising a C-shaped support constructed and arranged to be slipped over the stem of a diskshaped abrading tool and to engage the back thereof, a frame on which said support is mounted, a circular plate mounted in said frame for movement toward the working face of a tool engaging said support, means for urging said plate toward the tool to cause an adhesive-coated abrasive disk carried by the plate to adhere to the working face of the tool, and an axial projection on said plate engageable with an axial recess in the tool to center the tool.

' 6. A device for applying abrasive disks to rotary abrading tools comprising a support for the back of a disk-shaped abrading tool, said support being in the form of an annulus having an opening to enablethe stern of the abrading tool to enter the annulus, a frame, pivot members carried by said frame, said support being mounted for tilting movement on said pivot members, a circular plate mounted in said frame for movement toward the working face of the tool, and means for urging said plate toward the tool to cause 'an adhesive-coated abrasive disk carried by the plate to adhere .to the working face of the tool.

'7. A device for applying an abrasive disk to a rotary abrading tool on'a shaft, said device comprising a frame, a C-shaped tool supporting member constructed and. arranged to be slipped over the stem of the tool and to engageithe back thereof, .a presser plate 'slidably mounted in said frame forv movement toward and from said support, and a lever for applying pressure to force said platetoward the working face of a tool held in said support to adhesively attach an'abrasive disk to said tool.

8. A device for applying abrasivedisks torotary abrading tools comprising a frame, an annular tool supporting member tiltablymounted on said frameand having an opening inon'e side thereof to admitthespindleiofa tool, a presser plate slidably mounted in said frame for movement toward and from said support, a lever .for applying pressure to force said platetoward the working face of a tool held in said support to press an adhesive-coated abrasive disk against the working surface of the'tool, andma ,pin'engageable with a'recess in the tool for centering said tool with relation to said presser plate.

' 1 ERNEST HOPE. 

